Telephone.



E. KOEHLER. TELEPHONE.

APPLICATION FILED JAN.12, 1909.

Patented May 18, 1909,

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ww a 2% UNITED'ST'ATES EUGENE KOEI-ILER, OF PHILADEILPHIA. PENNSYLVANIA.

TE LE PHONE.

F0 all who? it may concern:

Be it known that I, EUGENE KOEHLER, a citizen of the United States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Telephones, of which the following is a specification.

My invention relates to improvements in telephones, the object being to provide an improved telephone constructed to transmit speech when ilaced against the body of the sender, to uti ize the vibrations of the body,

as distinguished from the sound waves, such as utilized in the ordinary construction of telephone.

A- further object isto provide improvements of this character, constructed and ada ted to be self-sustaining upon the body of tile user, enabling him to employ his hands for any use desired.

Heretofore in the construction of telephones, it has been the practice to construct the tele hone with a transmitter into which the senr er speaks, utilizing the sound waves to vibrate the transmitter. I have discovered that the transmitter, when placed against the body, will transmit speech by reason of the vibrations of the body of the user, and my invention is designed as a telephone of this kind.

The invention consists in certain novel features of construction, and combinations,

and arrangements of parts as will be more pointed out ear of the user, and this member 1 is provided.

with an eye 5 to enable the telephone to be hung up out of the way. The member 2 is also a tubular or hollow member, and has an ordinary transmitter 6 at its free end. The member 3 is a spring bar, and all of said members, 1, 2 and 3 are provided, or made inte ral with circular disks 7, 8 and 9 respective y, located side by side, spaced apart by Washers 10, and )ivotally secured upon a journal pin 11. his journal pin 11, also Specification of Letters Patent.

Application filed January 12, 1909.

Patented May 18, 1909.

Serial No. 471,851.

secures to the opposite sides of the assembled disks 7, 8 and 9, cup-shaped casings 12. The journal pin 11 is provided with a head 13 at one end, and a headed screw 14 is screwed into the other end of thejournal in, to efi ectually clamp the casings 12 and isks 7, 8 and 9, in assembled formation, permitting pivotal movement of the members with relation to each other.

In the drawings, I have illustrated a simple construction of circuit closer, in which 15 represents contact points. on the disk 9, movable with member 2, and contact points 16 on the disk 8, connected with member 1. These contact points are connected by wires 17, with the'transrnitter 6 and the receiver 1, and are adapted when the contact points 15 engage the contact points 16 to close the electric circuit, and call up the central ofiice, as is ordinarily the case with telephones in use, and an alarm 19 is connected by wires 20 with the telephone in any approved manner, so as to sound the alarm when a party is being called by the central office.

The construction and operation of the circuit wires are not shown, but will be the same as in any ordinary telephone.

A spring 21, preferably of the ordinary clock spring type, is located in one of the casings 12, secured at one end to the journal 11, and at its other end to the disk 9, and as the journal 11 is locked to the disk 7, by means of a key 22, it will be seen that the tension of the spring- 2], tends to move the members 2 and 3 toward each other, and hence move the contact points 15 away from the contact points 16.

' When the device is to be used, the members 2 and 3 are drawn apart and placed over the shoulder of the user, the body being clamped between the members and holds them in such position, that the contact points 15 and 16 will close the electric circuit and call central. To steady the device, a lateral prop 23 is secured to the'member 1, by means of a set screw 24, and prevents lateral tilting of the device when in use. When in osition on the body, with the receiver 4 c ose to the ear, the user talks in the ordinary tone of voice, and the speech will be transmitted by thetransmitter 6, through the medium of the vibrations of the body.

When the device is not desired for use, and is removed from the shoulder of the user, s ring 21 will break the electric circuit as a ove explained, and the telephone may be hungiip by means of the eye 5, until again desired.

'ters Patent is:

' 1.- In an apparatus of the character described, the combination with a transmitter and asprmg'arm having elastic connection two subscribing and an arm, said arm and transmitter constituting a body clamp to clamp the body between them, and a receiver supported by said transmitter and arm.v

2. In an apparatus of the character (le scribed, the combination with a transmitter,

with the transmitter, whereby abody may be clamped between said transmitter and said arm, and a receiver connected with said transmitter and springarm at their juncture.

disks on all of said side, 'a journal pivotally connecting said 3. Ina telephone, the combination with a receiver, a transmitter, and a spring arm, of

' disks on all of said members locatedside by side, a journal pivotally connectingsaid disks, a spring normally pressing said trans- .mitter and spring arm toward each other,

and electric contacts between the transmitter and the receiver normally held apart by means of the s ring.

4. In a telep one, the combination with a receiver, atransmitter, and a spring arm, of members located side by disks,'a springn'ormally pressing said transmitten and springarm toward each other, electric contacts and the receiver normally held apart by means of the sprin said transmitter and arm ada )ted to camp; a body between them, an a prop secured to the receiver and adapted to reston.thc-shoulderlof the body.

In testimony whereof Ihav'e signed my name to this specification in. the presence of witnesses:

EUGENE KOEHLER;

Witnesses LILLIAN GRUNINGER,

LoUrsE M. RAYNOR. 

